When to Plant Pumpkin in Honolulu, Hawaii (96815)
Location
Honolulu, Hawaii
ZIP Code
96815
USDA Zone
12b
Last Frost
Friday, January 1, 2027
📅 Planting Calendar
Direct Sow Outdoors Friday, November 20, 2026
Pro Tip: Pumpkin can be directly sown outdoors. Plant 6 weeks before your last frost date.
🌿 Plant Details
Scientific Name Cucurbita maxima
Days to Maturity 100 days
Mature Height 12-24"
Spread 120"
Type Vine
Fruit Size Large (8-20 lbs)
☀️ Growing Requirements
☀️
Sun
Full Sun (6-8 hours)
💧
Water
Regular (1 inch/week)
↔️
Spacing
60" apart
🌱
Planting Depth
1" deep
Seeds typically germinate in 5-10 days
🤝 Good Companions
CornBeanMarigoldNasturtium
⚠️ Avoid Planting Near
Potato
Other Plants for Honolulu
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Growing Pumpkin in Zone 12b
Pumpkin (Cucurbita maxima) is a popular garden vegetable. In Honolulu, Hawaii, which is in USDA Hardiness Zone 12b, you should direct sow seeds around Friday, November 20, 2026.
Your average last frost date is Friday, January 1, 2027. Pumpkin grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.